It's not easy but my Filipina Wife had to apply for a shengen visa from the Portuguese Embassy in Manilla which was actually in the Greek Embassy , We tried Spain and she was refused twice, For a Tourist visa you will have to show funds and an itinerary for what you will be doing everyday of your stay and prove you intend to leave, UK/EU is a nightmare , glad we are back in Thailand now :-)
She will need to apply for a Shengen visa for the Country you want to visit, once she gets that visa she can travel to 26 other shengen Countries, Don't apply for Spain, it's very difficult, Portugal is much easier but you will still have to jump through hoops.
Also a Brit in Spain leaving for Hua hin in 2 days time, for retirement Hua hin is a much nicer area than Pattaya, I know I lived there and in Jomtien for a few years. Good luck and happy travels.